Multi-Objective Optimization of Multistage Centrifugal Pump Based on Surrogate Model
Multi-Objective Optimization of Multistage Centrifugal Pump Based on Surrogate Model
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DOI：
10.1115/1.4043775
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
Shui-guang Tong;Zhao Hang;Huiqin Liu;Yu-qing Yue;Liu Jinfu;Feiyun Cong
中科院分区：
文献类型：
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作者：
Shui-guang Tong;Zhao Hang;Huiqin Liu;Yu-qing Yue;Liu Jinfu;Feiyun Cong
本文研究了十级离心泵水力效率的优化计算方法。根据水力损失模型，提出了一种基于代理模型的多目标优化计算方法。为了研究离心泵关键设计变量与泵外特性值之间的高度非线性关系，采用计算机流体动力学（CFD）仿真分析方法，建立了二次响应面、径向基高斯响应面和Kriging三种代理模型。采用两种计算模型（水力损失模型和三种代理模型）结合NSGA-遗传算法对关键设计变量进行优化，并求出各模型的最优解。对比分析了基于两种计算模型的效率优化方法的精度和有效性。结果表明，基于半理论半经验公式的水力损失模型计算方法耗时少，但不准确。相比之下，基于CFD模拟的代理模型的优化方法是准确的。通过对代理模型的比较，发现基于完全二次响应面模型的计算结果更准确，使一级离心泵的效率达到了77.26%。
In this paper, the hydraulic efficiency optimization calculation method of a ten-stage centrifugal pump is researched. According to the hydraulic loss model, a multi-objective optimization calculation method based on surrogate models is proposed. In order to study the highly nonlinear relationship between key design variables and centrifugal pump external characteristic values, this paper builds the quadratic response surface, the radial basis Gaussian response surface, and Kriging three surrogate models using computer fluid dynamics (CFD) simulation analysis. Two types of calculation models (hydraulic loss model and three surrogate models) combined NSGA-Π genetic algorithm are applied to optimize the key design variables and to find the optimal solution of each model. The accuracy and effectiveness of the efficiency optimization methods based on the two types of calculation models are compared and analyzed. The results show that the calculation method of hydraulic loss model based on the semitheoretical and semi-empirical formula is less time-consuming but inaccurate. In contrast, the optimization method based on surrogate models using CFD simulation is accurate. What's more, comparing the surrogate models, the results based on the complete quadratic response surface model which make the efficiency of the first stage centrifugal pump reach 77.26% are more accurate.